stongest usb wireless card with detachable antenna

I need to know which USB wireless device THAT HAS A standard 4-5 inch DETACABLE ANTENNA is the stongest and longest pick up range not the ones with super attachements I need to know the stongest unit first and go from there
I also need to know which one will allow antenna upgrades after the fact

I bought a ralink and I dont know if it failed or what but my laptop has more pickup than it and it boasted long disances

I need it to pickup on G networks mostly so I need it to be stong with G but I want it to have N as well

range is important

then what about speed

I did some research and allot of people think that the alfa is the best AWUS036NHR

but what about a dual antenna is this somehow better like the following

Etekcity High Power 802.11 B/N/G 300M USB Wireless 1000mw Wifi Network Adapter with Dual Antenna(forget that its a g just the concept)



and what is with the Mw (millewatts) I seen some on ebay that say even up to 6000Mw the alfa is a 2000\
does a bigger number make for more stonger unit

there was one who thought the UAWIFI usb adapter was better it is a little spendy and I want a detachable antenna which this one does not but its weather proof

anyway I need the base unit to be powerful then add my own upgrades to it via detachable antenna

what do you think is the stongest

Google 'Alfa Network' and take a look at the different models they offer. I have the AWUS036H with a 9dBi antenna and I can pick up networks for for miles.

What you want to look for when purchasing these is the txpower and the antenna gain. A 1000mW txpower means that it transmits the signal with 1 watt of power (which is very powerful; most computers only transmit with about a quarter of the power). I would say you don't need more than 1000mW unless you really know what you're doing.

When you're picking an antenna, you're going to want to look for the gain amount, which is going to be in dBi (for isometric antenna). If you look on ebay, you'll find some 9dBi antennas for cheap, which are about a foot long. An even better solution would be to look for a directional antenna since these are typically more powerful.

I hope this helps!

The engenius EUB9603H is by far the best long range USB adapter on the market.

http://www.keenansystems.com/store/c...roducts_id=314

It has a SMA connector for externa antenan and ships with a large 5DBi omni antenna.

We have reports of 3 mile range on water with the optional 8.5DBi omni

Keenan Systems Wireless Store - 8.5dBi omni directional antenna n female connector